#40FF57#40FF57

#40FF57 is a very light, highly saturated green. Relative luminance 0.733; OKLCH L 87.6% C 0.257 H 144.5°. Best body text is #000000 at 15.66:1 contrast (WCAG AA passes).

Color values

HEX	#40FF57
RGB	rgb(64, 255, 87)
HSL	hsl(127, 100%, 63%)
HSV	hsv(127, 75%, 100%)
CMYK	cmyk(74.9%, 0%, 65.9%, 0%)
CIE-LAB	lab(88.59, -77.39, 64.63)
CIE-LCH	lch(88.59, 100.83, 140.13°)
OKLab	oklab(87.61% -0.2091 0.1491)
OKLCH	oklch(87.61% 0.257 144.5)
XYZ	xyz(39.5920, 73.2935, 21.0754)
Luminance	0.7330 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40FF57 #FF40E8

analogous

#89FF40 #40FF57 #40FFB6

triadic

#40FF57 #5740FF #FF5740

tetradic

#40FF57 #4089FF #FF40E8 #FFB640

square

#40FF57 #4089FF #FF40E8 #FFB640

split-complementary

#40FF57 #B640FF #FF4089

monochromatic

#00C518 #03FF21 #40FF57 #7DFF8D #BAFFC3

Accessibility & contrast

On white

1.34

#40FF57 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

15.66

#40FF57 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40FF57

15.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40FF57	#FFFFFF	#000000	##000000
##40FF57	1.00	1.34	15.66	15.66
#FFFFFF	1.34	1.00	21.00	21.00
#000000	15.66	21.00	1.00	1.00
##000000	15.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE740

Deuteranopia (green-blind)

#EED967

Tritanopia (blue-blind)

#00F8DD

Achromatopsia (no color)

#DEDEDE

Design tokens & code

CSS

--color: #40ff57;
/* rgb */ color: rgb(64, 255, 87);
/* oklch */ color: oklch(87.6% 0.257 144.5);

Tailwind

colors: {
  custom: {
    50: '#91ff8d',
    500: '#40ff57',
    950: '#000000',
  },
}

SCSS

$custom: #40ff57;
$custom-light: #91ff8d;
$custom-dark: #000000;

JSON

{
  "hex": "#40ff57",
  "rgb": {
    "r": 64,
    "g": 255,
    "b": 87
  },
  "hsl": {
    "h": 127.225,
    "s": 100,
    "l": 62.549
  },
  "oklch": {
    "l": 0.87611,
    "c": 0.25684,
    "h": 144.5
  },
  "luminance": 0.73298
}

Semantic roles & 50–950 ramp

primary

#40FF57

secondary

#C122AE

accent

#00CAE6

background

#FCFFFC

surface

#F5FFF4

border

#CFD7CE

text

#0F180D

muted

#80867F

Preview Lab

Preview with #40FF57

Body copy rendered with the generated semantic roles for this colour.

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